IKE协商中，如果是野蛮模式，则双方需要交互（）个消息报文。 ["3","4","5","6"]
Fisher精确检验法的适用条件是（） ["T>5","n>40","T<1或n<40","1","E.以上都对<\/t<5>"]
哪些是营销策划的原则。（） [" 超前性"," 及时性"," 效益性"," 应变性"," 创新性"]
当用具有全波整流电路的万用表，选择量程种类开关置交流电压100V量程时，测量100V直流电压。此时仪表的读数是（）。 ["0V","100V","111V","70.7V"]
螨病
肝片吸虫病
